At first (as always) I wanted to blame the board but after seeing this issue occur on more than one device I believe it may be a setting. For some reason, and I can not yet find a common pattern, I have a 2x PTP RB911G-5HPnD boards mounted inside itelite's panel 5 ghz daul band antennas. For some reason it just decides to stop pushing any ethernet traffic through, when I connect to the board wirelessly, eth1 is not disabled, it just shows no traffic being sent through eth1. I am working literally on the gulf coast in a salt water/coal dust/high temp/high humidity environment, but only these two boards are doing this. The other 4 boards I have all with the same hardware (minus 2 having 2.4 GHz itelite antennas) all function fine. Any takers?